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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Sibling Traversal

Juan Garcia
Juan Garcia
10,577 Points

sibling traversal

A delegated click event listener has been attached to the selected ul element, which is stored in the variable list. The handler is targeting each button in the list. When any one of the buttons is clicked, a class of highlight should be added to the paragraph element immediately preceding that button inside the parent list item element. Add the code to create this behavior on line 5.

app.js
const list = document.getElementsByTagName('ul')[0];

list.addEventListener('click', function(e) {
  if (e.target.tagName == 'BUTTON') {

  }
});
index.html
<!DOCTYPE html>
<html>
    <head>
        <title>JavaScript and the DOM</title>
    </head>
    <link rel="stylesheet" href="style.css" />
    <body>
        <section>
            <h1>Making a Webpage Interactive</h1>
            <p>Things to Learn</p>
            <ul>
                <li><p>Element Selection</p><button>Highlight</button></li>
                <li><p>Events</p><button>Highlight</button></li>
                <li><p>Event Listening</p><button>Highlight</button></li>
                <li><p>DOM Traversal</p><button>Highlight</button></li>
            </ul>
        </section>
        <script src="app.js"></script>
    </body>
</html>
Steven Parker
Steven Parker
231,020 Points

It doesn't look like you've written any code yet.

And you also did not mention any specific issues or ask any specific question. Please give it your best "good faith" attempt and then be sure to show your code and mention your issue(s) if you're still having trouble.

If you're totally stuck, you may want to re-watch the video.

Please give it your best "good faith" attempt and then be sure to show your code and mention your issue(s) if you're still having trouble.

Agreed with Steven Parker.

1 Answer

Juan Garcia
Juan Garcia
10,577 Points

I know when it says when one of the buttons is clicked, a class of highlight should be add like this: if (e.target.className == 'highlight') {

} Then after that I get confused. Is the parent list the ul?